Finding the Fourth Proportional to 12,980.07, 17,913.83 and 7,947.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,980.07 : 17,913.83 = 7,947.62 : x
2. Step 2: Convert to fraction form
   12,980.07/17,913.83 = 7,947.62/x
3. Step 3: Cross multiply
   12,980.07x = 17,913.83 × 7,947.62
4. Step 4: Simplify right side
   12,980.07x = 142,372,184.28
5. Step 5: Solve for x
   x = 142,372,184.28/12,980.07
6. Step 6: Final answer
   x = 10,968.52